"In 2004, Department of Homeland Security officials became fearful that
terrorists might start using accidental dig-ups as a road map for deliberate
attacks, and convinced the FCC to begin locking up previously public data on
outages. In a commission filing, DHS argued successfully that revealing the
details..."
--MORE--
http://wired.com/news/technology/0,70040-0.html?tw=wn_tophead_1
-Dennis